+++ /dev/null
-/*
- * Tegra Graphics Host VII2C
- *
- * Copyright (c) 2014, NVIDIA CORPORATION. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include <linux/export.h>
-#include <linux/module.h>
-#include <linux/resource.h>
-#include <linux/pm_runtime.h>
-#include <linux/delay.h>
-#include <linux/of_platform.h>
-#include <linux/clk.h>
-#include <linux/clk/tegra.h>
-#include <linux/slab.h>
-#include <linux/vii2c.h>
-#include <linux/regulator/consumer.h>
-#include <linux/tegra-powergate.h>
-
-#include <media/tegra_v4l2_camera.h>
-#include <media/camera.h>
-#include "dev.h"
-#include "bus_client.h"
-#include "nvhost_acm.h"
-#include "nvhost_job.h"
-#include "nvhost_channel.h"
-#include "nvhost_cdma.h"
-#include "host1x/host1x01_hardware.h"
-#include "class_ids.h"
-#include "nvhost_cdma.h"
-#include "t210/t210.h"
-#include "vii2c.h"
-
-#define POWERGATE_DELAY 10
-
-struct vii2c {
- bool registered;
- struct regulator *reg;
- u32 syncpt_id;
- u32 sync_fence;
-};
-
-static struct platform_device *vii2c_pdev;
-
-static struct of_device_id vii2c_of_match[] = {
-#if defined(CONFIG_TEGRA_GRHOST_VII2C)
- {
- .compatible = "nvidia,tegra210-vi-i2c",
- .data = (struct nvhost_device_data *)&t21_vii2c_info,
- },
-#endif
- { },
-};
-
-int nvhost_vii2c_finalize_poweron(struct platform_device *pdev)
-{
- struct nvhost_device_data *pdata = platform_get_drvdata(pdev);
- struct vii2c *vii2c = pdata->private_data;
- int err = 0;
-
- if (vii2c->reg) {
- err = regulator_enable(vii2c->reg);
- if (err)
- nvhost_err(&pdev->dev,
- "%s: enable csi regulator failed.\n", __func__);
- }
-
-
- return err;
-}
-
-int nvhost_vii2c_prepare_poweroff(struct platform_device *pdev)
-{
- struct nvhost_device_data *pdata = platform_get_drvdata(pdev);
- struct vii2c *vii2c = pdata->private_data;
- int err = 0;
-
- if (vii2c->reg) {
- err = regulator_disable(vii2c->reg);
- if (err)
- nvhost_err(&pdev->dev,
- "%s: disable csi regulator failed.\n",
- __func__);
- }
-
- return err;
-}
-
-void nvhost_vii2c_module_reset(struct platform_device *pdev)
-{
- struct nvhost_device_data *pdata = platform_get_drvdata(pdev);
-
- if (!pdata->clk[0])
- return;
-
- /* assert module reset */
- tegra_periph_reset_assert(pdata->clk[0]);
-
- udelay(POWERGATE_DELAY);
- /* deassert reset */
- tegra_periph_reset_deassert(pdata->clk[0]);
-}
-
-int nvhost_vii2c_start(struct platform_device *pdev)
-{
- struct nvhost_syncpt *sp = &nvhost_get_host(pdev)->syncpt;
- struct nvhost_device_data *pdata = platform_get_drvdata(pdev);
- struct vii2c *vii2c = pdata->private_data;
- int err;
-
- nvhost_dbg_fn("");
- if (!vii2c->registered)
- return -EINVAL;
-
- err = nvhost_mutex_try_lock(sp, NVMODMUTEX_VI);
- if (err) {
- nvhost_err(&pdev->dev, "%s busy\n", __func__);
- return err;
- }
- nvhost_module_reset(pdev, true);
- err = nvhost_module_busy(pdev);
- if (err) {
- nvhost_err(&pdev->dev, "%s err %d\n", __func__, err);
- nvhost_mutex_unlock(sp, NVMODMUTEX_VI);
- return err;
- }
-
- vii2c->sync_fence = 0;
-
- return 0;
-}
-EXPORT_SYMBOL(nvhost_vii2c_start);
-
-int nvhost_vii2c_end(struct platform_device *pdev)
-{
- struct nvhost_syncpt *sp = &nvhost_get_host(pdev)->syncpt;
- struct nvhost_device_data *pdata = platform_get_drvdata(pdev);
- struct vii2c *vii2c = pdata->private_data;
-
- nvhost_dbg_fn("");
-
- if (!vii2c->registered)
- return -EINVAL;
-
- nvhost_module_idle(pdev);
- nvhost_mutex_unlock(sp, NVMODMUTEX_VI);
-
- return 0;
-}
-EXPORT_SYMBOL(nvhost_vii2c_end);
-
-int nvhost_vii2c_reset(struct platform_device *pdev)
-{
- struct nvhost_syncpt *sp = &nvhost_get_host(pdev)->syncpt;
- struct nvhost_device_data *pdata = platform_get_drvdata(pdev);
- struct vii2c *vii2c = pdata->private_data;
-
- if (!vii2c->registered)
- return -EINVAL;
-
- /* reset the vi-i2c state to ensure that the state is valid */
- nvhost_module_reset(pdev, false);
-
- /* ..then perform CPU increments */
- nvhost_syncpt_set_min_eq_max(sp, vii2c->syncpt_id);
-
- nvhost_syncpt_read_check(sp, vii2c->syncpt_id, &vii2c->sync_fence);
- nvhost_dbg_fn("%x\n", vii2c->sync_fence);
- return 0;
-}
-EXPORT_SYMBOL(nvhost_vii2c_reset);
-
-int nvhost_vii2c_flush(struct platform_device *pdev)
-{
- struct nvhost_syncpt *sp = &nvhost_get_host(pdev)->syncpt;
- struct nvhost_device_data *pdata = platform_get_drvdata(pdev);
- struct vii2c *vii2c = pdata->private_data;
-
- nvhost_dbg_fn("%s %d\n", __func__, vii2c->sync_fence);
-
- if (!vii2c->registered)
- return -EINVAL;
-
- vii2c->sync_fence += 1;
- return nvhost_syncpt_wait_timeout(sp, vii2c->syncpt_id,
- vii2c->sync_fence, 100, NULL, NULL, NULL);
-}
-EXPORT_SYMBOL(nvhost_vii2c_flush);
-
-int nvhost_vii2c_hw_sync_inc(struct platform_device *pdev, int n)
-{
- struct nvhost_device_data *pdata = platform_get_drvdata(pdev);
- struct vii2c *vii2c = pdata->private_data;
-
- return nvhost_class_host_incr_syncpt(n, vii2c->syncpt_id);
-}
-EXPORT_SYMBOL(nvhost_vii2c_hw_sync_inc);
-
-struct platform_device *nvhost_vii2c_open(void)
-{
- struct nvhost_device_data *pdata;
- struct vii2c *vii2c;
-
- if (!vii2c_pdev)
- return NULL;
-
- pdata = platform_get_drvdata(vii2c_pdev);
- vii2c = pdata->private_data;
-
- if (vii2c->registered)
- return NULL;
-
- vii2c->registered = true;
-
- return vii2c_pdev;
-}
-EXPORT_SYMBOL(nvhost_vii2c_open);
-
-void nvhost_vii2c_close(void)
-{
- struct nvhost_device_data *pdata;
- struct vii2c *vii2c;
-
- if (!vii2c_pdev)
- return;
-
- pdata = platform_get_drvdata(vii2c_pdev);
- if (!pdata)
- return;
-
- vii2c = pdata->private_data;
- if (!vii2c)
- return;
-
- vii2c->registered = false;
-}
-EXPORT_SYMBOL(nvhost_vii2c_close);
-
-static int vii2c_probe(struct platform_device *dev)
-{
- struct nvhost_device_data *pdata = NULL;
- struct vii2c *vii2c;
- int err = 0;
-
- if (dev->dev.of_node) {
- const struct of_device_id *match;
- match = of_match_device(vii2c_of_match, &dev->dev);
- if (match)
- pdata = (struct nvhost_device_data *)match->data;
- } else
- pdata = (struct nvhost_device_data *)dev->dev.platform_data;
-
- if (!pdata) {
- nvhost_err(&dev->dev, "no platform data");
- return -ENODATA;
- }
-
- pdata->pdev = dev;
- mutex_init(&pdata->lock);
- platform_set_drvdata(dev, pdata);
-
- /* allocate vi-i2c private data */
- vii2c = devm_kzalloc(&dev->dev, sizeof(*vii2c), GFP_KERNEL);
- if (!vii2c)
- return -ENOMEM;
- pdata->private_data = vii2c;
-
- /* get regulator */
- vii2c->reg = devm_regulator_get(&dev->dev, "avdd_dsi_csi");
- if (IS_ERR(vii2c->reg)) {
- err = PTR_ERR(vii2c->reg);
- nvhost_err(&dev->dev, "could not get regulator: %d", err);
- return err;
- }
-
- /* allocate a syncpoint for vi-i2c */
- vii2c->syncpt_id = nvhost_get_syncpt_client_managed("vii2c");
- if (!vii2c->syncpt_id) {
- nvhost_err(&dev->dev, "could not allocate a syncpoint");
- return -ENOMEM;
- }
-
- err = nvhost_client_device_get_resources(dev);
- if (err)
- goto vii2c_probe_fail;
-
- nvhost_module_init(dev);
-
- /* add module power domain and also add its domain
- * as sub-domain of MC domain */
-
- pdata->pd.name = "vii2c";
- err = nvhost_module_add_domain(&pdata->pd, dev);
- if (err)
- goto vii2c_probe_fail;
-
- err = nvhost_client_device_init(dev);
- if (err)
- goto vii2c_probe_fail;
-
- vii2c_pdev = dev;
-
- nvhost_dbg_info("initialized");
- return 0;
-
-vii2c_probe_fail:
- nvhost_err(&dev->dev, "failed");
- return err;
-}
-
-static int __exit vii2c_remove(struct platform_device *dev)
-{
- struct nvhost_device_data *pdata = platform_get_drvdata(dev);
- struct vii2c *vii2c = pdata->private_data;
-
- vii2c_pdev = NULL;
-
- nvhost_client_device_release(dev);
- nvhost_free_syncpt(vii2c->syncpt_id);
-
- return 0;
-}
-
-static struct platform_driver vii2c_driver = {
- .probe = vii2c_probe,
- .remove = __exit_p(vii2c_remove),
- .driver = {
- .owner = THIS_MODULE,
- .name = "vi-i2c",
-#ifdef CONFIG_OF
- .of_match_table = vii2c_of_match,
-#endif
- }
-};
-
-static int __init vii2c_init(void)
-{
- return platform_driver_register(&vii2c_driver);
-}
-
-static void __exit vii2c_exit(void)
-{
- platform_driver_unregister(&vii2c_driver);
-}
-
-device_initcall(vii2c_init);
-module_exit(vii2c_exit);
-MODULE_LICENSE("GPL v2");
projects / sojka / nv-tegra / linux-3.10.git / commitdiff